Window-fastener.



W. GADKE.

WINDOW FASTENER. APPLICATION HLED Auml. ram

Patented Oct. 30, 1917.

U g riniTnn sTaT-ns TATENT orricn lio WILLIAM GADKE, or rHrLnnn'meH-rn, :PENNSYLVANIA wrnnoi/v-ras'rnnnn.

'citizenv of the United States, residing at 2222 WV. 'Huntingdon `:Philadelphia, in -the county of :Philadelphia and `State of v"Penn- My invention relates 4to window fasteners lof the type that are :secured -tofone`-of1the sashes of the window vand engage l:the f other "sash orthefframe of the window. v

'The jpurpose of my invention 4'is to v simplify the construction, -to'hold vthe fasten-` ing boltin :place by4 the same spring which normally `presses the lbolt toward locking positioiuto seeureefl'ective "forward i-feed by a 'single cam surfaceand afs/ingle spring, and to latch thebolt in both locking and open positions by said single l spring.

Further purposes of my invei'itio'n"v'fill appear' in the; specification and particularly in the claims thereof.

I have preferred to illustratienyinvention by but one foif'nrthereof,selecting one which has proved iinkuseftob'e `practicable, efficient and inexpensive` and which at the same time well illustrates the ip'i-"incip" les of my invention.

Figure 1 is a perspective View of my fastener in unlocking position.

Fig. 2 is a central longitudinal section of my fastener', the sash upon which it is mounted and the adjoining engaging member.

Fig. 3 is a front elevation of my fastener with the locking pin removed therefrom.

Fig. 4 is a section of Fig. 3 'upon lines 4.-4.

Fig. 5 is a partly sectioned side elevation of a modified form.

In the drawings similar numerals of reference indicate like parts.

My fastener is intended for use upon one of the bars of a window sash, either upon the face of the side or top bar, or top rail of a lower sash to engage the upper sash at the side or at some point along its bottom rail, or upon the inner edge of the side bar of either sash, passing through it parallel to the glass and engaging the inside of the channel of the window frame.

The body 5 of the fastener comprises a plate 6 turned down at 7 and 8 to form sides, and fastened to the sash at the ends by strips 9 or 9 and 10, which may also be l --Speciiication of Letters Patent. y Appli-Carien'eiedlaugust11,1916;#serial-nonnina f made to close theends-f'eifectually ffThe-re'nd 9 is adapted for engagement :with fa sash -face aty right angles to*l the face o'f fthe Iplate,

as where-itis rsecuretlto --thetop oflth'e side bar. VBut wherefbothffastener'ends'vare to be Yr secured kto thefface `of the bar the fend 9"'1'(Fig. 5) is mademuch likethat 10.

The ends fare=apertured at '11, 121for ksuitable fa'ttaehinent. Y f gl i 1 The bolt 13 is adapted to be turned fby hand. For Lconvenience, the-outerl end is'-v provided `with a knurledhead *14.1 i Thefbolt is annularly grooved at 15 tofseat theholkilowedien'd Alfof azspring -17 whose opposite Aend, '18 'is riveted lto the@y easingiftopfas at f19.

lfhe springnormally pressesthebolttoathey 2 right i in Fig n2.

.At 1Lthe edge aof -the aperture 't 20,

i through 'which thebolt passes, a strip A,of the metal -of thetop is eut loose alongithersideland lat r`which ithe ipin 22 upon the 1bolt'i1will iride, when the bolt is turnedinaelockwisedirection, 'froin the position :shown inr fFig. 2 until the bolt. I,is drawn :against -the pressure of the springwsufficiently "for thecpin` r 22 to emerge from the body of the fastener, `when :further =movement r' causes :it 'to rreach `wthelpreferably radial groove 23, into which the pin is drawn by the action of the spring. This latches the bolt in the unlocked position. 1n order not to interfere with movement of the pin 22 when within the body of the fastener, I prefer not to convex the inin following it moves in a substantially e spiral path.

Vhen the locking bolt is turned in a counter-clockwise direction the spring causes the pin 22 to follow the surface of the cam 21 until it reaches the lower part of the body of the fastener at preferably the same time that the spring Vcomes to rest. Further turning of the bolt causes the pin 22 to press between the Linder face of plate 6 and the spring, forcing the spring beyond its position of rest, so that when the bolt isturned opposite the preferably radial groove 25 the pin 22 is pressed within this groove by the spring, latching the bolt in its locking position.

The groove 25 is preferably made by pressing the metal outwardly', providing a corresponding convexity upon the outside of the plate 6 as at 26, Which closely adjoins the groove 23, protecting against excessive turning of the rod and pin in unlocked position. f

The bolt is shown as entering one of the apertures 27 of a reinforcing plate 28. rlhe apertures are laterally extended to permit relative movement of one sash relative to the other or to the casing. .V y

It Will be evident that my sash lock gives a shearing strain upon the bolt, can be kused for either the center or the side of the sash, can be Withdrawn by rotation Without having to pull it out against the spring, is securely heldin both inner and outer posi- .tions by spring-pressure, and cannot be opened by an implement inserted between i vthe sash.

. Whatl claim .as new and desire to secure by Having thus described my invention,

Letters Patentk is l. In a sash lock, a body, apertured, and having a cam strip about the aperture, a bolt passing through the aperture, `circumferentially grooved, and having a head thereon adapted to be turned, a pin radially projecting from the bolt at a point located .between a bolt adapted to pass through the aperture,

and having a circumferential groove, a leaf spring engaging the Walls of the groove` and a pin uponthe bolt adapted to ride upon thel cam and fit between the spring and the internal groove. l p

t, A sash lock comprising a body having an aperture and external and internal radial grooves in the Walls of the body adjacent the aperture, a cam strip forming a substantially* spiral track about the aperture, in combination with a spring secured to the ,internal wall ofthe body, and a bolt adapted to litthrough the aperture and circumferentially grooved to receive the free end of spring and a radially-extending pin adapted to engage the cam strip and fit into the radial grooves.

` WILLIAM GADKE.

Witnesses: f KATHRYN A. SUMMERs,

WM. STEELL JACKSON.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

